During the summer of 1950, Dr. I. O. Buss, Professor of Wildlife Managemenr, State College of Washington, made a study of the food habits and ecology of the upland plover, Bartramia longicauda (Bechstein), in the Duke River Meadow, five miles north of Burwash Landing, southwestern Yukon Territory (Buss, 1951). Periodical sweepings, at weekly intervals, were made through three transects of the meadow, indicated in this paper by stations 1, 2, and 3. It was from this source thar the collections of insects, including a large number of Diptera, were obtained. Because of the remoteness of the region from any other in which, to the best of our knowledge, insect collecting has been done, and because of the ecological data presented hy Dr. Buss, we feel that the publication of this annotated list of species is warranted.

Numerous methods of rearing grasshoppers under laboratory conditions have been described (Brett, 1947; Carothers, 1937; Haydak, 1942; Parker, 1930). One now used at the Belleville laboratom to provide hosts for small-scale propagation of parasites has been very satisfictory for the rearing of several species of Cyrtacanthacrinae and Oedipodinae. It most closely resembles rhe method described by Haydak (1942), but requires only one type of cage. The rearing is done in a room with a constant temperature of 24°C. and a relative humidity of 50-60 per cent. The method described is dependent upon the use of field-collected eggs.

The adults of Phytophaga piceae Felt were described (1) from shoots of white spruce, Picea glauca (Moench) Voss., collected in Manitoba by Swaine in 1926. Felt stated that the shoots suggested the galls of Chermes similis Gill., but he did not describe them. The life-history was unknown. Twigs of white spruce showing damage of a similar nature were collected by Swaine at Fort Coulonge, P.Q., in 1919, but no adults were obtained from this sample.

The species of Rhaphium Mg. (s.l.) may be divided, for convenience, into two group—those with white-faced males and those with black-faced males. Since the North American species of the genus were last revised (Curran, 1926, 1927), 13 species belonging to the former group have been described. In this paper one species with black-faced males is described as new, one is recorded from the Nearctic region and one from Canada for the first rime, and one species with white-faced males is also recorded from Canada for the first time.

Only two species of Corixidae, commonly known as water boatmen, are known to occur in both the Old and New Worlds. One of these is Callicorixa producta Reuter, which Hungerford (1948) has divided into three subspecies. On the basis of existing records the typical subspecies is restricted to the Scandinavian peninsula and Finland. The second subspecies, producta sackalinensis (Matsumura), is so far known only from northern Manchuria and Sakhalin Island. The third subspecies, producta noorvikensis Hungerford, appears to straddle the Rering Sea, specimens being recorded from near Kolyma River in Siberia and from Bering Island in the Komandorskies east across Alaska and Northwest Territories to Hudson Bay.

Experimental aerial spraying to control mosquitoes was carried out in 1949 and 1950 at several stations of the Royal Canadian Air Force in northern Canada. An account of the work in 1949 has been presented (Twinn, Brown, and Hurtig, 1950). The experiments in 1949 involved the use of a larvicide, followed by a spray against the adults. Further data were required on the degree of effective control that could be obtained by applying one or two sprays against the adult mosquitoes only, in plots of reasonable size. Consequently, in 1950, arrangements were made with the R.C.A.F. to carry out airspray operations against adult mosquitoes at four stations in the Northwest as follows: Fort Nelson, B.C., 24 sq. mi. in two operations, June 6-8 and 19-20; Whitehorse, Y.T., 22 sq. mi. in two operations, June 13-15 and June 30-July 1; Watson Lake, Y.T., 12 sq. mi. June 21-22; and Norman Wells, N.W.T., 8 sq. mi. June 28-29.

Nutritional studies on plant sucking insects have not made outstanding progress in the past decade. The information on the rearing of aphids on prepared liquid foods is rather scanty. Carter (1927, 1928, 1945) developed techniques for the artificial feeding of homopterous insects, particularly leafhoppers and mealybugs. Fife (1932) and Severin et al. (1928) devised cages for the artificial feeding of leafhoppers. These authors suggested many excellent ideas on the use of membranes, but the works of Hamilton (1930, 1935) on the green peach aphid, Myzus persicae (Sulz.). appear to be the most thorough source of informarinn on the artificial feeding of aphids. Pletsch (1937) also developed a device for the artificial feeding of aphids and his apparatus presents several advantages over previously described devices. Various types of cages and membranes were used by the above workers with limited success. They have all succeeded in getting homopterous insects to feed temporarily on special diets through different types of membranes, but they were unable to maintain the development of these insects and have them reproduce under artificial conditions.